<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			#二{
				padding: 10px;
				margin: 10px;
				margin-top: 10px;
				border: 4px solid;
				position: ;
			}
		</style>
	</head>
	<body>
		<div id="一" style="background-color: antiquewhite;width: 300px;height: 300px;">
			<div id="二" style="background-color: red;width: 100px;height: 100px;">hahah </div>
		</div>
	</body>
</html>